Electrical controller.



PATENTBD SEPT. 22, 1903.

G. 0. MARX. ELEGTRIGA L CONTROLLER. APPLIOATIOH FILED JULY 2 Pcrzns c0. womumm wAsyinuron u c H0 MODEL.

UNITED STATES GUSTAVE o. MARX, OF ELIZABETH,

Patented September 22, 1903.

NEW JERSEY, ASSIGNOR TO DIEI'ILv MANUFACTURING COMPANY, A CORPORATION OF NEWV JERSEY.

ELECTRICAL CONTROLLER.

srnorrronrron forming part of'Letters Patent No. 739,433, dated September 22, 1903. Application filed July 2, 1903- Serial No 164,007. (No model.)

To all whom it may concern:

Be it known that I, GUSTAVE O. MARX, a citizen of the United States, residing at Elizaboth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Electrical Controllers,of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an improvement in that class of controllers which are employed more particularly in connection with electric sewing-m achine motors and are mounted upon the tables or work-benches by which the driven machines are carried. Heretofore the accumulation of foreign matter, and particularly of lint from the sewing-machines to the tables of which these controllers have been associated, has in some cases been the cause of fire due to the ignition of such accumulated matter upon and around the operative parts of the device by the are produced in breaking the electric circuit when stopping the machine.

The present invention has for its object to so incase the operative parts of the controller as to effectively exclude the dust and other foreign matter which has heretofore caused such trouble, and to thus obviate the danger of fire from such cause and also to prevent the deterioration of the device from its operation when clogged with such foreign matter.

The invention consists, essentially, in a casing for the operative parts of the controller and comprising a flat base member formed with a cover-seat,to which is closely fitted and removably secured a cover for closing the cas ing dustproof, combined with a contact-lever with its operative portion insulated from and wholly inclosed within said casing, but having a spindle passing through the wall of the latter by a dust proof joint and provided upon its outer end with an operating arm or lever. In its preferred form the cover-seat is disposed somewhat below the level of the usual series of contact-points and adjacent segmental contact-plate, and the contact-1ever is mounted upon the cover member of the casing,so that the removal of the latter exposes the contact-surfaces for brightening up after their efiectiveness has been impairedin some degree by extensive use of the device.

The invention will be understood by reference to the annexed drawings, in which Figures 1 and 2 are detached views of the component members of the casing with their attached operative parts, Fig. 1 being a plan of the base member and Fig. 2 a perspective view of the cover membentaken from the n11- der or inner side. tion of the controller with the parts carried thereby in operative relation.

The base member consists of a flat plate a, having a recess 1) in its lower side, which is closed by means of the bottom plate 0, secured 6 5 I in position by the bolt d. Upon its upper side the plate a is provided with a marginal cover-seate, surrounding a segmental projection f, upon 'which, with suitable interposed insulation, is secured a segmentally-arranged series of live contact-points g by means of the insulated screws 7%, passing through the plate a and connected upon the opposite face of the latter, each with the ends of two adjacent members of a series of resistance-coils i,

of which the opposite ends are similarly connected with other said contact-points of the series. Adjacent said live contact-points g is an insulated dead contact-pointj, having no permanent electrical connection with other live parts of the device.

The live contact point 9 farthest from the dead-pointj is connected, by means of a Wire is, with a binding-post Z, constituting one pole of the controller, the other pole of which is a second binding-post Z,connected by a wire 70 with the insulated segmental contact-plate m, secured upon two insulating-washers n by screws n.

The cover member 0 of the casing is fitted o ver mounted upon theinner end of a spindle 9 5 g, which is journaled in and extends through the upper or outer wall of the cover member 0 and has upon its outer end the operating arm or lever r.

The contact-lever has one of 1ts Fig. 3 is a transverse sec-v 60 parts 5 Ice rigidly secured to the inner end of the spindle, its outer part i being secured thereto by means of insulated screws 20, passing through an interposed strip 1) of insulating material, such as vulcanized fiber, by means of which it is insulated from the other part 3 and the casing a 0.

The outeror operative portion of the parti is provided with a socket t to receive the loosely-fitted carbon contact-block w, pressed inwardly by one end of a fiat spring 50, having its other end attached to the part if of the contact-lever by means of a screwy.

The cover member 0 is formed with an aperture o for access to the operative parts of the device for purposes of adjustment and inspection, such aperture being normally closed by means of a cover-plate 2.

Having thus described the invention, what I claim herein is- 1. In an electrical controller, the combination with a dust-proof casing comprising a flat base member having a cover-seat and a cover member fitted closely to and secured removably upon said seat, of a connected series of resistance-coils, a series of insulated contact-points connected with said coils and a contact-plate insulated from said contactpoints, all mounted upon said base member of the casing, a spindle journaled in and extending through the wall of said casing, a contact-lever fixed upon the inner end of said spindle and having its operative portion insulated therefrom and adapted to establish electrical connection between said contactplate and contact'points, and an operating arm or lever secured upon the outer end of said spindle exterior to said casing.

23. In an electrical controller, the combination with a dust-proof casing comprising a fiat base member having a marginal coverseat and a cover member fitted closely to and secured removably upon said seat, of a connected series of resistance-coils, a series of insulated contact-points connected with said coils and a contact-plate insulated from said contact-points, all mounted upon said base member of the casing but projecting above its cover-seat, a spindle journaled in and extending through the wall of said cover member, a contact-lever fixed upon the inner end of said spindle and having its operative portion insulated therefrom and adapted to establish electrical connection between said contact-plate and contact-points, and an opcrating arm or lever secured upon the outer end of said spindle exterior to said cover member.

3. In an electrical controller, the combination with a dust-proof casing comprising a base member having a cover-seat and a cover member fitted closely to and secured removably upon said seat and provided with an aperture for accessto the contents of said casing, of a series of insulated contact-points connected with said coils and a contact-plate insulated from contact-points, all mounted upon said base member of the casing, a spindle j ournaled in and extending through that portion of the wall of the cover member having said aperture, a two-part contact-lever mounted upon the inner end of said spindle with its operative portion insulated therefrom and provided with a socket, a contactblock mounted loosely in said socket, a fiat spring carried by said lever beneath said aperture in the cover member and adapted to press said contact-block upon said contactplate and points, a cover-plate secured removably upon the outer face of said cover member to cover its said aperture, and an operating arm or lever fixed upon the outer end of said spindle exterior to said casing.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GUSTAVE O. MARX. lVit-nesses:

W. E. OARMIOHAEL, WM. JNo. OoNNELL. 

